^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) // Copyright IBM Corp 2019
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/fsi-occ.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include "common.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) struct p9_sbe_occ {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) struct occ occ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) struct device *sbe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #define to_p9_sbe_occ(x) container_of((x), struct p9_sbe_occ, occ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static int p9_sbe_occ_send_cmd(struct occ *occ, u8 *cmd)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct occ_response *resp = &occ->resp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct p9_sbe_occ *ctx = to_p9_sbe_occ(occ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) size_t resp_len = sizeof(*resp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) rc = fsi_occ_submit(ctx->sbe, cmd, 8, resp, &resp_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) if (rc < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) switch (resp->return_status) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) case OCC_RESP_CMD_IN_PRG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) rc = -ETIMEDOUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) case OCC_RESP_SUCCESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) rc = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) case OCC_RESP_CMD_INVAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) case OCC_RESP_CMD_LEN_INVAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) case OCC_RESP_DATA_INVAL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) case OCC_RESP_CHKSUM_ERR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) rc = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) case OCC_RESP_INT_ERR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) case OCC_RESP_BAD_STATE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) case OCC_RESP_CRIT_EXCEPT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) case OCC_RESP_CRIT_INIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) case OCC_RESP_CRIT_WATCHDOG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) case OCC_RESP_CRIT_OCB:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) case OCC_RESP_CRIT_HW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) rc = -EREMOTEIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) rc = -EPROTO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static int p9_sbe_occ_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct occ *occ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) struct p9_sbe_occ *ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (!ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) ctx->sbe = pdev->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) occ = &ctx->occ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) occ->bus_dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) platform_set_drvdata(pdev, occ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) occ->powr_sample_time_us = 500;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) occ->poll_cmd_data = 0x20; /* P9 OCC poll data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) occ->send_cmd = p9_sbe_occ_send_cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) rc = occ_setup(occ, "p9_occ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) if (rc == -ESHUTDOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) rc = -ENODEV; /* Host is shutdown, don't spew errors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static int p9_sbe_occ_remove(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) struct occ *occ = platform_get_drvdata(pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) struct p9_sbe_occ *ctx = to_p9_sbe_occ(occ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ctx->sbe = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) occ_shutdown(occ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static struct platform_driver p9_sbe_occ_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .name = "occ-hwmon",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .probe = p9_sbe_occ_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .remove = p9_sbe_occ_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) module_platform_driver(p9_sbe_occ_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) MODULE_AUTHOR("Eddie James <eajames@linux.ibm.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) MODULE_DESCRIPTION("BMC P9 OCC hwmon driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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